64519490 has 64 divisors (see below), whose sum is σ = 141177600. Its totient is φ = 20756736.

The previous prime is 64519489. The next prime is 64519523. The reversal of 64519490 is 9491546.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74681 + ... + 75539.

It is an arithmetic number, because the mean of its divisors is an integer number (2205900).

Almost surely, 2^64519490 is an apocalyptic number.

64519490 is an abundant number, since it is smaller than the sum of its proper divisors (76658110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64519490 is a wasteful number, since it uses less digits than its factorization.

64519490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 64519490 is about 8032.4025048549. The cubic root of 64519490 is about 401.0793556919.

The spelling of 64519490 in words is "sixty-four million, five hundred nineteen thousand, four hundred ninety".